Name : TSUJI,  Yoshinobu
            Position : Associate Professor
            Division/Center : Division of Disaster Mitigation Science
            Research Area : Tsunami and Historical Earthquakes
 
 

Research :

Earthquakes and tsunamis which occurred before the end of the 19th century are studied mainly on a bases of documents materials.
       Periodicity of a series of gigantic earthquakes of Tokai-Nankai Earthquakes is discussed. In the recent few years we made piston
       coring on the bottom layer of several lagoons (Lake Hamana, Tadasuga-Ike Pond in Susaki City, Shikoku, and so on) and found out
       several traces of pre-historical tsunamis. It was clarified that descriptions of a small tsunami in January 26, 1700 at several points on
       the Japanese Islands were the records of a distant tsunami which was caused by a gigantic earthquake at Cascadia Subduction Zone,
       whose geological evidences were found out on the Canadian and American Coasts.
       Tsunamis and storm surges are studied not only on the scientific viewpoint but also on the natural hazzard mitigation. Since 1992,
       large tsunamis occurred in succession on the coasts of the circum pan-Pacific countries; 1992 Nicaraguan, 1992 Indonesia-Flores,
       1994 East Java, 1994 Okushiri,1996 Irian Jaya, and 1998 Papua New Guinean tsunamis. Whenever large tsunamis occurred we
       organized international survey teams and conducted field surveys on the damaged coast.

Publications :

Tappin D.R., T. Matsumoto, W. Watts, K. Satake, G.M. McMurtry, M. Matsuyama, Lafoy and Y. Tsuji, Sediment slump likely caused 1998 Papua New Guinea Tsunami, EOS Transactions, American Geophysical Union, 80(30), 329, 334, 340, 1999.

Tsuji, Y., P. Watt, and M. Matsuyama, Results of onland survey of the 1998 Aitape Earthquake- Tsunami, Papua New Guinea, KR98-13, Cruise Report - Papua New Guinea, JAMSTEC, 98-13, 2--7, 1999.

Tsuji, Y. and M. Moihoi, Seismic background and Historical Earthquakes at Sissano Lagoon, KR 98-13 Cruise Report, Papua New Guinea, JAMSTEC, 98-13, 8--20, 1999.

 T. Matsumoto, D.R. Tappin, Y. Tsuji, W. Lus, M. Moihoi, H. Letz, M. Nongkas and T. Katayama, Preliminary Report of SOS-3 Cruse (NT99-15), Off Sissano-Aitape north coast of Papua New Guinea, Shinkai-2000, R/V Natsushima, JAMSTEC, 1--225, 1999.

Tsuji, Y., and Y. Murakami, Numerical Simuation (of the tsunami of the 1998 Aitape Earthquake, Papua New Guinea), Preliminary report of SOS-2 Cruise (NT99-02) , off Sissano-Aitape North coast of Papue New Guinea, 18 Feb.- 01 March, 1999, R/V Kairei, JAMSTEC, 93--98, 1999.